I was certainly worried about time travel and that the puzzle could have been set at some future time when you could get married at 11. However, I am depressed to see that the reference to Nobel Prize winners refers to the number up to the date of setting. That is now what it says, and, if you travel in time, you could presumably find out even in 1964 how many such Laureates there would be.
So I think I will do the CAM crossword instead. I really cannot be bothered with something where I have to cheat (eg by finding out the two things mentioned above) in order to tackle.